diff --git a/Wox.Infrastructure/Logger/Log.cs b/Wox.Infrastructure/Logger/Log.cs
index ff72dff1c3..cc1408b533 100644
--- a/Wox.Infrastructure/Logger/Log.cs
+++ b/Wox.Infrastructure/Logger/Log.cs
@@ -47,8 +47,53 @@ namespace Wox.Infrastructure.Logger
             return valid;
         }
 
-        /// <param name="message">example: "|prefix|unprefixed" </param>
-        public static void Error(string message)
+        
+
+        [MethodImpl(MethodImplOptions.Synchronized)]
+        public static void Exception(string className, string message, System.Exception exception, [CallerMemberName] string methodName = "")
+        {
+            if (string.IsNullOrWhiteSpace(className))
+            {
+                LogFaultyFormat($"Fail to specify a class name during logging of message: {message ?? "no message entered"}");
+            }
+
+            if (string.IsNullOrWhiteSpace(message))
+            { // todo: not sure we really need that
+                LogFaultyFormat($"Fail to specify a message during logging");
+            }
+
+            if (!string.IsNullOrWhiteSpace(methodName))
+            {
+                className += "." + methodName;
+            }
+
+            ExceptionInternal(className, message, exception);
+        }
+
+        private static void ExceptionInternal(string classAndMethod, string message, System.Exception e)
+        {
+            var logger = LogManager.GetLogger(classAndMethod);
+
+            System.Diagnostics.Debug.WriteLine($"ERROR|{message}");
+
+            logger.Error("-------------------------- Begin exception --------------------------");
+            logger.Error(message);
+
+            do
+            {
+                logger.Error($"Exception full name:\n <{e.GetType().FullName}>");
+                logger.Error($"Exception message:\n <{e.Message}>");
+                logger.Error($"Exception stack trace:\n <{e.StackTrace}>");
+                logger.Error($"Exception source:\n <{e.Source}>");
+                logger.Error($"Exception target site:\n <{e.TargetSite}>");
+                logger.Error($"Exception HResult:\n <{e.HResult}>");
+                e = e.InnerException;
+            } while (e != null);
+
+            logger.Error("-------------------------- End exception --------------------------");
+        }
+
+        private static void LogInternal(string message, LogLevel level)
         {
             if (FormatValid(message))
             {
@@ -57,8 +102,8 @@ namespace Wox.Infrastructure.Logger
                 var unprefixed = parts[2];
                 var logger = LogManager.GetLogger(prefix);
 
-                System.Diagnostics.Debug.WriteLine($"ERROR|{message}");
-                logger.Error(unprefixed);
+                System.Diagnostics.Debug.WriteLine($"{level.Name}|{message}");
+                logger.Log(level, unprefixed);
             }
             else
             {
@@ -78,25 +123,7 @@ namespace Wox.Infrastructure.Logger
                 var parts = message.Split('|');
                 var prefix = parts[1];
                 var unprefixed = parts[2];
-                var logger = LogManager.GetLogger(prefix);
-
-                System.Diagnostics.Debug.WriteLine($"ERROR|{message}");
-
-                logger.Error("-------------------------- Begin exception --------------------------");
-                logger.Error(unprefixed);
-
-                do
-                {
-                    logger.Error($"Exception full name:\n <{e.GetType().FullName}>");
-                    logger.Error($"Exception message:\n <{e.Message}>");
-                    logger.Error($"Exception stack trace:\n <{e.StackTrace}>");
-                    logger.Error($"Exception source:\n <{e.Source}>");
-                    logger.Error($"Exception target site:\n <{e.TargetSite}>");
-                    logger.Error($"Exception HResult:\n <{e.HResult}>");
-                    e = e.InnerException;
-                } while (e != null);
-
-                logger.Error("-------------------------- End exception --------------------------");
+                ExceptionInternal(prefix, unprefixed, e);
             }
             else
             {
@@ -104,62 +131,29 @@ namespace Wox.Infrastructure.Logger
             }
 #endif
         }
-        
+
+        /// <param name="message">example: "|prefix|unprefixed" </param>
+        public static void Error(string message)
+        {
+            LogInternal(message, LogLevel.Error);
+        }
+
         /// <param name="message">example: "|prefix|unprefixed" </param>
         public static void Debug(string message)
         {
-            if (FormatValid(message))
-            {
-                var parts = message.Split('|');
-                var prefix = parts[1];
-                var unprefixed = parts[2];
-                var logger = LogManager.GetLogger(prefix);
-
-                System.Diagnostics.Debug.WriteLine($"DEBUG|{message}");
-                logger.Debug(unprefixed);
-            }
-            else
-            {
-                LogFaultyFormat(message);
-            }
+            LogInternal(message, LogLevel.Debug);
         }
 
         /// <param name="message">example: "|prefix|unprefixed" </param>
         public static void Info(string message)
         {
-            if (FormatValid(message))
-            {
-                var parts = message.Split('|');
-                var prefix = parts[1];
-                var unprefixed = parts[2];
-                var logger = LogManager.GetLogger(prefix);
-
-                System.Diagnostics.Debug.WriteLine($"INFO|{message}");
-                logger.Info(unprefixed);
-            }
-            else
-            {
-                LogFaultyFormat(message);
-            }
+            LogInternal(message, LogLevel.Info);
         }
 
         /// <param name="message">example: "|prefix|unprefixed" </param>
         public static void Warn(string message)
         {
-            if (FormatValid(message))
-            {
-                var parts = message.Split('|');
-                var prefix = parts[1];
-                var unprefixed = parts[2];
-                var logger = LogManager.GetLogger(prefix);
-
-                System.Diagnostics.Debug.WriteLine($"WARN|{message}");
-                logger.Warn(unprefixed);
-            }
-            else
-            {
-                LogFaultyFormat(message);
-            }
+            LogInternal(message, LogLevel.Warn);
         }
     }
 }
\ No newline at end of file
diff --git a/Wox.Infrastructure/StringMatcher.cs b/Wox.Infrastructure/StringMatcher.cs
index 58ffa336fc..deff9ff7b5 100644
--- a/Wox.Infrastructure/StringMatcher.cs
+++ b/Wox.Infrastructure/StringMatcher.cs
@@ -6,13 +6,14 @@ using Wox.Infrastructure.Logger;
 using Wox.Infrastructure.UserSettings;
 using static Wox.Infrastructure.StringMatcher;
 
-namespace Wox.Infrastructure 
+namespace Wox.Infrastructure
 {
     public static class StringMatcher
     {
         public static MatchOption DefaultMatchOption = new MatchOption();
 
-        public static string UserSettingSearchPrecision { get; set; }
+        public static int UserSettingSearchPrecision { get; set; }
+
         public static bool ShouldUsePinyin { get; set; }
 
         [Obsolete("This method is obsolete and should not be used. Please use the static function StringMatcher.FuzzySearch")]
@@ -45,51 +46,106 @@ namespace Wox.Infrastructure
         public static MatchResult FuzzySearch(string query, string stringToCompare, MatchOption opt)
         {
             if (string.IsNullOrEmpty(stringToCompare) || string.IsNullOrEmpty(query)) return new MatchResult { Success = false };
-
+            
             query = query.Trim();
 
-            var len = stringToCompare.Length;
-            var compareString = opt.IgnoreCase ? stringToCompare.ToLower() : stringToCompare;
-            var pattern = opt.IgnoreCase ? query.ToLower() : query;
+            var fullStringToCompareWithoutCase = opt.IgnoreCase ? stringToCompare.ToLower() : stringToCompare;
 
-            var sb = new StringBuilder(stringToCompare.Length + (query.Length * (opt.Prefix.Length + opt.Suffix.Length)));
-            var patternIdx = 0;
+            var queryWithoutCase = opt.IgnoreCase ? query.ToLower() : query;
+
+            int currentQueryToCompareIndex = 0;
+            var queryToCompareSeparated = queryWithoutCase.Split(' ');
+            var currentQueryToCompare = queryToCompareSeparated[currentQueryToCompareIndex];
+
+            var patternIndex = 0;
             var firstMatchIndex = -1;
+            var firstMatchIndexInWord = -1;
             var lastMatchIndex = 0;
-            char ch;
+            bool allMatched = false;
+            bool isFullWordMatched = false;
+            bool allWordsFullyMatched = true;
 
             var indexList = new List<int>();
 
-            for (var idx = 0; idx < len; idx++)
+            for (var index = 0; index < fullStringToCompareWithoutCase.Length; index++)
             {
-                ch = stringToCompare[idx];
-                if (compareString[idx] == pattern[patternIdx])
+                var ch = stringToCompare[index];
+                if (fullStringToCompareWithoutCase[index] == currentQueryToCompare[patternIndex])
                 {
                     if (firstMatchIndex < 0)
-                        firstMatchIndex = idx;
-                    lastMatchIndex = idx + 1;
+                    { // first matched char will become the start of the compared string
+                        firstMatchIndex = index;
+                    }
 
-                    indexList.Add(idx);
-                    sb.Append(opt.Prefix + ch + opt.Suffix);
-                    patternIdx += 1;
+                    if (patternIndex == 0)
+                    { // first letter of current word
+                        isFullWordMatched = true;
+                        firstMatchIndexInWord = index;
+                    }
+                    else if (!isFullWordMatched)
+                    { // we want to verify that there is not a better match if this is not a full word
+                        // in order to do so we need to verify all previous chars are part of the pattern
+                        int startIndexToVerify = index - patternIndex;
+                        bool allMatch = true;
+                        for (int indexToCheck = 0; indexToCheck < patternIndex; indexToCheck++)
+                        {   
+                            if (fullStringToCompareWithoutCase[startIndexToVerify + indexToCheck] !=
+                                currentQueryToCompare[indexToCheck])
+                            {
+                                allMatch = false;
+                            }
+                        }
+
+                        if (allMatch)
+                        { // update to this as a full word
+                            isFullWordMatched = true;
+                            if (currentQueryToCompareIndex == 0)
+                            { // first word so we need to update start index
+                                firstMatchIndex = startIndexToVerify;
+                            }
+
+                            indexList.RemoveAll(x => x >= firstMatchIndexInWord);
+                            for (int indexToCheck = 0; indexToCheck < patternIndex; indexToCheck++)
+                            { // update the index list
+                                indexList.Add(startIndexToVerify + indexToCheck);
+                            }
+                        }
+                    }
+
+                    lastMatchIndex = index + 1;
+                    indexList.Add(index);
+
+                    // increase the pattern matched index and check if everything was matched
+                    if (++patternIndex == currentQueryToCompare.Length)
+                    {
+                        if (++currentQueryToCompareIndex >= queryToCompareSeparated.Length)
+                        { // moved over all the words
+                            allMatched = true;
+                            break;
+                        }
+
+                        // otherwise move to the next word
+                        currentQueryToCompare = queryToCompareSeparated[currentQueryToCompareIndex];
+                        patternIndex = 0;
+                        if (!isFullWordMatched)
+                        { // if any of the words was not fully matched all are not fully matched
+                            allWordsFullyMatched = false;
+                        }
+                    }
                 }
                 else
                 {
-                    sb.Append(ch);
-                }
-
-                // match success, append remain char
-                if (patternIdx == pattern.Length && (idx + 1) != compareString.Length)
-                {
-                    sb.Append(stringToCompare.Substring(idx + 1));
-                    break;
+                    isFullWordMatched = false;
                 }
             }
 
-            // return rendered string if we have a match for every char
-            if (patternIdx == pattern.Length)
+
+            // return rendered string if we have a match for every char or all substring without whitespaces matched
+            if (allMatched)
             {
-                var score = CalculateSearchScore(query, stringToCompare, firstMatchIndex, lastMatchIndex - firstMatchIndex);
+                // check if all query string was contained in string to compare
+                bool containedFully = lastMatchIndex - firstMatchIndex == queryWithoutCase.Length;
+                var score = CalculateSearchScore(query, stringToCompare, firstMatchIndex, lastMatchIndex - firstMatchIndex, containedFully, allWordsFullyMatched);
                 var pinyinScore = ScoreForPinyin(stringToCompare, query);
 
                 var result = new MatchResult
@@ -105,7 +161,8 @@ namespace Wox.Infrastructure
             return new MatchResult { Success = false };
         }
 
-        private static int CalculateSearchScore(string query, string stringToCompare, int firstIndex, int matchLen)
+        private static int CalculateSearchScore(string query, string stringToCompare, int firstIndex, int matchLen,
+            bool isFullyContained, bool allWordsFullyMatched)
         {
             // A match found near the beginning of a string is scored more than a match found near the end
             // A match is scored more if the characters in the patterns are closer to each other, 
@@ -122,6 +179,16 @@ namespace Wox.Infrastructure
                 score += 10;
             }
 
+            if (isFullyContained)
+            {
+                score += 20; // honestly I'm not sure what would be a good number here or should it factor the size of the pattern
+            }
+
+            if (allWordsFullyMatched)
+            {
+                score += 20;
+            }
+
             return score;
         }
 
@@ -143,11 +210,11 @@ namespace Wox.Infrastructure
             {
                 if (Alphabet.ContainsChinese(source))
                 {
-                    var combination = Alphabet.PinyinComination(source);                    
+                    var combination = Alphabet.PinyinComination(source);
                     var pinyinScore = combination
                         .Select(pinyin => FuzzySearch(target, string.Join("", pinyin)).Score)
                         .Max();
-                    var acronymScore = combination.Select(Alphabet.Acronym)                        
+                    var acronymScore = combination.Select(Alphabet.Acronym)
                         .Select(pinyin => FuzzySearch(target, pinyin).Score)
                         .Max();
                     var score = Math.Max(pinyinScore, acronymScore);
@@ -162,7 +229,7 @@ namespace Wox.Infrastructure
             {
                 return 0;
             }
-        }        
+        }
     }
 
     public class MatchResult
@@ -178,6 +245,7 @@ namespace Wox.Infrastructure
         /// The raw calculated search score without any search precision filtering applied.
         /// </summary>
         private int _rawScore;
+
         public int RawScore
         {
             get { return _rawScore; }
@@ -200,10 +268,7 @@ namespace Wox.Infrastructure
 
         private bool IsSearchPrecisionScoreMet(int score)
         {
-            var precisionScore = (SearchPrecisionScore)Enum.Parse(
-               typeof(SearchPrecisionScore),
-               UserSettingSearchPrecision ?? SearchPrecisionScore.Regular.ToString());
-            return score >= (int)precisionScore;
+            return score >= UserSettingSearchPrecision;
         }
 
         private int ApplySearchPrecisionFilter(int score)
@@ -214,22 +279,18 @@ namespace Wox.Infrastructure
 
     public class MatchOption
     {
-        public MatchOption()
-        {
-            Prefix = "";
-            Suffix = "";
-            IgnoreCase = true;
-        }
-
         /// <summary>
         /// prefix of match char, use for hightlight
         /// </summary>
-        public string Prefix { get; set; }
+        [Obsolete("this is never used")]
+        public string Prefix { get; set; } = "";
+
         /// <summary>
         /// suffix of match char, use for hightlight
         /// </summary>
-        public string Suffix { get; set; }
+        [Obsolete("this is never used")]
+        public string Suffix { get; set; } = "";
 
-        public bool IgnoreCase { get; set; }
+        public bool IgnoreCase { get; set; } = true;
     }
-}
+}
\ No newline at end of file
diff --git a/Wox.Infrastructure/UserSettings/Settings.cs b/Wox.Infrastructure/UserSettings/Settings.cs
index de5a2e6624..5a129832aa 100644
--- a/Wox.Infrastructure/UserSettings/Settings.cs
+++ b/Wox.Infrastructure/UserSettings/Settings.cs
@@ -36,14 +36,27 @@ namespace Wox.Infrastructure.UserSettings
         }
 
 
-        private string _querySearchPrecision { get; set; } = StringMatcher.SearchPrecisionScore.Regular.ToString();
-        public string QuerySearchPrecision
+        internal StringMatcher.SearchPrecisionScore QuerySearchPrecision { get; private set; } = StringMatcher.SearchPrecisionScore.Regular;
+
+        public string QuerySearchPrecisionString
         {
-            get { return _querySearchPrecision; }
+            get { return QuerySearchPrecision.ToString(); }
             set
             {
-                _querySearchPrecision = value;
-                StringMatcher.UserSettingSearchPrecision = value;
+                try
+                {
+                    var precisionScore = (StringMatcher.SearchPrecisionScore)Enum.Parse(
+                        typeof(StringMatcher.SearchPrecisionScore),
+                        value);
+                    QuerySearchPrecision = precisionScore;
+                    StringMatcher.UserSettingSearchPrecision = (int)precisionScore;
+                }
+                catch (System.Exception e)
+                {
+                    // what do we do here?!
+                    Logger.Log.Exception(nameof(Settings), "Fail to set QuerySearchPrecision", e);
+                    throw;
+                }
             }
         }
 
diff --git a/Wox.Test/FuzzyMatcherTest.cs b/Wox.Test/FuzzyMatcherTest.cs
index 21563f91f9..b5fe58cac1 100644
--- a/Wox.Test/FuzzyMatcherTest.cs
+++ b/Wox.Test/FuzzyMatcherTest.cs
@@ -12,17 +12,25 @@ namespace Wox.Test
     [TestFixture]
     public class FuzzyMatcherTest
     {
+        private const string Chrome = "Chrome";
+        private const string CandyCrushSagaFromKing = "Candy Crush Saga from King";
+        private const string HelpCureHopeRaiseOnMindEntityChrome = "Help cure hope raise on mind entity Chrome";
+        private const string UninstallOrChangeProgramsOnYourComputer = "Uninstall or change programs on your computer";
+        private const string LastIsChrome = "Last is chrome";
+        private const string OneOneOneOne = "1111";
+        private const string MicrosoftSqlServerManagementStudio = "Microsoft SQL Server Management Studio";
+
         public List<string> GetSearchStrings()
             => new List<string>
             {
-                "Chrome",
+                Chrome,
                 "Choose which programs you want Windows to use for activities like web browsing, editing photos, sending e-mail, and playing music.",
-                "Help cure hope raise on mind entity Chrome ",
-                "Candy Crush Saga from King",
-                "Uninstall or change programs on your computer",
+                HelpCureHopeRaiseOnMindEntityChrome,
+                CandyCrushSagaFromKing,
+                UninstallOrChangeProgramsOnYourComputer,
                 "Add, change, and manage fonts on your computer",
-                "Last is chrome",
-                "1111"
+                LastIsChrome,
+                OneOneOneOne
             };
 
         public List<int> GetPrecisionScores()
@@ -76,17 +84,17 @@ namespace Wox.Test
 
             Assert.True(scoreResult == 0);
         }
-        
+
         [TestCase("chr")]
         [TestCase("chrom")]
-        [TestCase("chrome")]        
+        [TestCase("chrome")]
         [TestCase("cand")]
         [TestCase("cpywa")]
         [TestCase("ccs")]
         public void WhenGivenStringsAndAppliedPrecisionFilteringThenShouldReturnGreaterThanPrecisionScoreResults(string searchTerm)
         {
             var results = new List<Result>();
-            
+
             foreach (var str in GetSearchStrings())
             {
                 results.Add(new Result
@@ -94,7 +102,7 @@ namespace Wox.Test
                     Title = str,
                     Score = StringMatcher.FuzzySearch(searchTerm, str).Score
                 });
-            }            
+            }
 
             foreach (var precisionScore in GetPrecisionScores())
             {
@@ -114,20 +122,23 @@ namespace Wox.Test
             }
         }
 
-        [TestCase("chrome")]
-        public void WhenGivenStringsForCalScoreMethodThenShouldReturnCurrentScoring(string searchTerm)
+        [TestCase]
+        public void WhenGivenStringsForCalScoreMethodThenShouldReturnCurrentScoring()
         {
+            // Arrange
+            string searchTerm = "chrome"; // since this looks for specific results it will always be one case
             var searchStrings = new List<string>
             {
-                "Chrome",//SCORE: 107
-                "Last is chrome",//SCORE: 53
-                "Help cure hope raise on mind entity Chrome",//SCORE: 21
-                "Uninstall or change programs on your computer", //SCORE: 15
-                "Candy Crush Saga from King"//SCORE: 0
+                Chrome,//SCORE: 107
+                LastIsChrome,//SCORE: 53
+                HelpCureHopeRaiseOnMindEntityChrome,//SCORE: 21
+                UninstallOrChangeProgramsOnYourComputer, //SCORE: 15
+                CandyCrushSagaFromKing//SCORE: 0
             }
             .OrderByDescending(x => x)
             .ToList();
 
+            // Act
             var results = new List<Result>();
             foreach (var str in searchStrings)
             {
@@ -138,23 +149,23 @@ namespace Wox.Test
                 });
             }
 
-            var orderedResults = results.OrderByDescending(x => x.Title).ToList();
+            // Assert
+            VerifyResult(147, Chrome);
+            VerifyResult(93, LastIsChrome);
+            VerifyResult(41, HelpCureHopeRaiseOnMindEntityChrome);
+            VerifyResult(35, UninstallOrChangeProgramsOnYourComputer);
+            VerifyResult(0, CandyCrushSagaFromKing);
 
-            Debug.WriteLine("");
-            Debug.WriteLine("###############################################");
-            Debug.WriteLine("SEARCHTERM: " + searchTerm);
-            foreach (var item in orderedResults)
+            void VerifyResult(int expectedScore, string expectedTitle)
             {
-                Debug.WriteLine("SCORE: " + item.Score.ToString() + ", FoundString: " + item.Title);
+                var result = results.FirstOrDefault(x => x.Title == expectedTitle);
+                if (result == null)
+                {
+                    Assert.Fail($"Fail to find result: {expectedTitle} in result list");
+                }
+
+                Assert.AreEqual(expectedScore, result.Score, $"Expected score for {expectedTitle}: {expectedScore}, Actual: {result.Score}");
             }
-            Debug.WriteLine("###############################################");
-            Debug.WriteLine("");
-                       
-            Assert.IsTrue(orderedResults[0].Score == 15 && orderedResults[0].Title == searchStrings[0]);
-            Assert.IsTrue(orderedResults[1].Score == 53 && orderedResults[1].Title == searchStrings[1]);
-            Assert.IsTrue(orderedResults[2].Score == 21 && orderedResults[2].Title == searchStrings[2]);
-            Assert.IsTrue(orderedResults[3].Score == 107 && orderedResults[3].Title == searchStrings[3]);
-            Assert.IsTrue(orderedResults[4].Score == 0 && orderedResults[4].Title == searchStrings[4]);
         }
 
         [TestCase("goo", "Google Chrome", (int)StringMatcher.SearchPrecisionScore.Regular, true)]
@@ -168,24 +179,58 @@ namespace Wox.Test
         [TestCase("cand", "Candy Crush Saga from King", (int)StringMatcher.SearchPrecisionScore.Regular, true)]
         [TestCase("cand", "Help cure hope raise on mind entity Chrome", (int)StringMatcher.SearchPrecisionScore.Regular, false)]
         public void WhenGivenDesiredPrecisionThenShouldReturnAllResultsGreaterOrEqual(
-            string queryString, 
-            string compareString, 
-            int expectedPrecisionScore, 
+            string queryString,
+            string compareString,
+            int expectedPrecisionScore,
             bool expectedPrecisionResult)
         {
-            var expectedPrecisionString = (StringMatcher.SearchPrecisionScore)expectedPrecisionScore;            
-            StringMatcher.UserSettingSearchPrecision = expectedPrecisionString.ToString();
+            // Arrange
+            var expectedPrecisionString = (StringMatcher.SearchPrecisionScore)expectedPrecisionScore;
+            StringMatcher.UserSettingSearchPrecision = expectedPrecisionScore; // this is why static state is evil...
+
+            // Act
             var matchResult = StringMatcher.FuzzySearch(queryString, compareString);
 
-            Debug.WriteLine("");
-            Debug.WriteLine("###############################################");
-            Debug.WriteLine($"SearchTerm: {queryString} PrecisionLevelSetAt: {expectedPrecisionString} ({expectedPrecisionScore})");
-            Debug.WriteLine($"SCORE: {matchResult.Score.ToString()}, ComparedString: {compareString}");
-            Debug.WriteLine("###############################################");
-            Debug.WriteLine("");
+            // Assert
+            Assert.AreEqual(expectedPrecisionResult, matchResult.IsSearchPrecisionScoreMet(),
+                $"Query:{queryString}{Environment.NewLine} " +
+                $"Compare:{compareString}{Environment.NewLine}" +
+                $"Raw Score: {matchResult.RawScore}{Environment.NewLine}" +
+                $"Precision Level: {expectedPrecisionString}={expectedPrecisionScore}");
+        }
 
-            var matchPrecisionResult = matchResult.IsSearchPrecisionScoreMet();            
-            Assert.IsTrue(matchPrecisionResult == expectedPrecisionResult);
+        [TestCase("exce", "OverLeaf-Latex: An online LaTeX editor", (int)StringMatcher.SearchPrecisionScore.Regular, false)]
+        [TestCase("term", "Windows Terminal (Preview)", (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        [TestCase("sql s managa", MicrosoftSqlServerManagementStudio, (int)StringMatcher.SearchPrecisionScore.Regular, false)]
+        [TestCase("sql' s manag", MicrosoftSqlServerManagementStudio, (int)StringMatcher.SearchPrecisionScore.Regular, false)]
+        [TestCase("sql s manag", MicrosoftSqlServerManagementStudio, (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        [TestCase("sql manag", MicrosoftSqlServerManagementStudio, (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        [TestCase("sql", MicrosoftSqlServerManagementStudio, (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        [TestCase("sql serv", MicrosoftSqlServerManagementStudio, (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        [TestCase("mic", MicrosoftSqlServerManagementStudio, (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        [TestCase("chr", "Shutdown", (int)StringMatcher.SearchPrecisionScore.Regular, false)]
+        [TestCase("chr", "Change settings for text-to-speech and for speech recognition (if installed).", (int)StringMatcher.SearchPrecisionScore.Regular, false)]
+        [TestCase("a test", "This is a test", (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        [TestCase("test", "This is a test", (int)StringMatcher.SearchPrecisionScore.Regular, true)]
+        public void WhenGivenQueryShouldReturnResultsContainingAllQuerySubstrings(
+            string queryString,
+            string compareString,
+            int expectedPrecisionScore,
+            bool expectedPrecisionResult)
+        {
+            // Arrange
+            var expectedPrecisionString = (StringMatcher.SearchPrecisionScore)expectedPrecisionScore;
+            StringMatcher.UserSettingSearchPrecision = expectedPrecisionScore; // this is why static state is evil...
+
+            // Act
+            var matchResult = StringMatcher.FuzzySearch(queryString, compareString);
+
+            // Assert
+            Assert.AreEqual(expectedPrecisionResult, matchResult.IsSearchPrecisionScoreMet(),
+                $"Query:{queryString}{Environment.NewLine} " +
+                $"Compare:{compareString}{Environment.NewLine}" +
+                $"Raw Score: {matchResult.RawScore}{Environment.NewLine}" +
+                $"Precision Level: {expectedPrecisionString}={expectedPrecisionScore}");
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Wox/App.xaml.cs b/Wox/App.xaml.cs
index 9436df4758..aa5426d062 100644
--- a/Wox/App.xaml.cs
+++ b/Wox/App.xaml.cs
@@ -55,7 +55,7 @@ namespace Wox
 
                 Alphabet.Initialize(_settings);
 
-                StringMatcher.UserSettingSearchPrecision = _settings.QuerySearchPrecision;
+                StringMatcher.UserSettingSearchPrecision = (int)_settings.QuerySearchPrecision;
                 StringMatcher.ShouldUsePinyin = _settings.ShouldUsePinyin;
 
                 PluginManager.LoadPlugins(_settings.PluginSettings);
diff --git a/Wox/SettingWindow.xaml b/Wox/SettingWindow.xaml
index 9a5146c7ee..a6f23814ff 100644
--- a/Wox/SettingWindow.xaml
+++ b/Wox/SettingWindow.xaml
@@ -62,7 +62,7 @@
                     <TextBlock Text="{DynamicResource querySearchPrecision}" />
                     <ComboBox Margin="10 0 0 0" Width="120"
                               ItemsSource="{Binding QuerySearchPrecisionStrings}" 
-                              SelectedItem="{Binding Settings.QuerySearchPrecision}" />
+                              SelectedItem="{Binding Settings.QuerySearchPrecisionString}" />
                 </StackPanel>
                 <StackPanel Margin="10" Orientation="Horizontal">
                     <TextBlock Text="{DynamicResource lastQueryMode}" />